New function: SB!KERNEL:%MULTIPLY-HIGH

[sbcl.git] / base-target-features.lisp-expr

diff --git a/base-target-features.lisp-expr b/base-target-features.lisp-expr
index ca1e90c..2428237 100644 (file)
--- a/base-target-features.lisp-expr
+++ b/base-target-features.lisp-expr
@@ -309,6 +309,12 @@
  ;; foreign code that uses a 32-bit off_t.
  ; :largefile
 
+ ;; Enabled automatically on platforms that have VOPs to compute the
+ ;; high half of a full word-by-word multiplication.  When disabled,
+ ;; SB-KERNEL:%MULTIPLY-HIGH is implemented in terms of
+ ;; SB-BIGNUM:%MULTIPLY.
+ ; :multiply-high-vops
+
  ;;
  ;; miscellaneous notes on other things which could have special significance
  ;; in the *FEATURES* list